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1  Using Arduino / Motors, Mechanics, and Power / Re: Controlling 2 12VDC 4 Amp Motors with the Arduino on: March 22, 2011, 03:09:59 pm
It occured to me that I have an old Adafruit Motor Shield (http://www.ladyada.net/make/mshield/index.html) lying around, I was wondering if using this PWM technique I might be able to control my motors with this. In addition I'd like to thank you veyr much for your help so far.
2  Using Arduino / Motors, Mechanics, and Power / Re: Controlling 2 12VDC 4 Amp Motors with the Arduino on: March 22, 2011, 02:56:11 pm
Thanks for the reply. As I'm rather new to the Arduino platform could you further explain my options in regards to PWM?
3  Using Arduino / Motors, Mechanics, and Power / Controlling 2 12VDC 4 Amp Motors with the Arduino on: March 22, 2011, 02:41:19 pm
Hi,

I'm rather new to the Arduino platform and am working on a project where I need to control 2 12VDC 4 Amp motors bi-directionally, I looked over motor shields but it appears these motors are too high amperage for use with a motor shield. Any suggestions on how to control both of these motors would be much appreciated.
4  Using Arduino / General Electronics / Re: Sharing Grounds for LDRs on: March 21, 2011, 07:57:23 pm
All right, Thank you Very much!
5  Using Arduino / General Electronics / Sharing Grounds for LDRs on: March 21, 2011, 07:50:16 pm
Hi,

New to the Arduino platform and had a quick question in regards to LDRs: I have 5 LDRs which I would like to read the amount of light from with my Arduino Uno, I'm connecting all 5 of their wires together and attaching it to the 3V pin and am wanting to read all of the values received in the analog read ports. The question which I have is can I share the ground for these LDRs, so could I attach 1 wire from every LDR together and then attach that to a resistor and to ground or do I need a resistor for each and every one which I can then connect to ground.

Any help would be much appreciated.
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